49 lines
1.7 KiB
C
49 lines
1.7 KiB
C
/* FCE Ultra - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
* Copyright (C) 2025 NewRisingSun
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "mapinc.h"
|
|
#include "asic_latch.h"
|
|
|
|
static DECLFR(readOB) {
|
|
return X.DB;
|
|
}
|
|
|
|
static void sync () {
|
|
if (Latch_address &0x02) {
|
|
setprg16(0x8000, Latch_address <<3 &0x10 | Latch_data &0x0F);
|
|
setprg16(0xC000, Latch_address <<3 &0x10 | 0x0F);
|
|
} else {
|
|
setprg16(0x8000, Latch_address <<3 &0x18 | Latch_data &0x07);
|
|
setprg16(0xC000, Latch_address <<3 &0x18 | 0x07);
|
|
}
|
|
SetReadHandler(0x8000, 0xFFFF, Latch_address &0x10 && ROM_size >8? readOB: CartBR);
|
|
setchr8(0);
|
|
}
|
|
|
|
static void trapLatchWrite (uint16 *newAddress, uint8 *newValue, uint8 romValue) {
|
|
if (Latch_address &0x20) *newAddress = Latch_address; /* Once bit 5 is set, only the inner bank bits can be modified. */
|
|
*newValue &= romValue; /* AND-type bus conflicts */
|
|
}
|
|
|
|
void Mapper573_Init (CartInfo *info) {
|
|
Latch_init(info, sync, 0x8000, 0xFFFF, trapLatchWrite);
|
|
info->Reset = Latch_clear;
|
|
}
|